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Priority to JP1979113166UpriorityCriticalpatent/JPS625487Y2/ja
Priority to US06/149,717prioritypatent/US4353055A/en
Priority to GB8016843Aprioritypatent/GB2053541B/en
Publication of JPS5631160UpublicationCriticalpatent/JPS5631160U/ja
Priority to US06/337,833prioritypatent/US4495484A/en
Application grantedgrantedCritical
Publication of JPS625487Y2publicationCriticalpatent/JPS625487Y2/ja